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Forbush Decreases and <2 Day GCR Flux Non-recurrent Variations Studied with LISA Pathfinder

  • M. Armano
  • , H. Audley
  • , J. Baird
  • , S. Benella
  • , P. Binetruy
  • , M. Born
  • , D. Bortoluzzi
  • , E. Castelli
  • , A. Cavalleri
  • , A. Cesarini
  • , A. M. Cruise
  • , K. Danzmann
  • , M. De Deus Silva
  • , I. Diepholz
  • , G. Dixon
  • , R. Dolesi
  • , M. Fabi
  • , L. Ferraioli
  • , V. Ferroni
  • , N. Finetti
  • E. D. Fitzsimons, M. Freschi, L. Gesa, F. Gibert, D. Giardini, R. Giusteri, C. Grimani, J. Grzymisch, I. Harrison, G. Heinzel, M. Hewitson, D. Hollington, D. Hoyland, M. Hueller, H. Inchauspé, O. Jennrich, P. Jetzer, N. Karnesis, B. Kaune, N. Korsakova, C. J. Killow, K. Kudela, M. Laurenza, J. A. Lobo, I. Lloro, L. Liu, J. P. López-Zaragoza, R. Maarschalkerweerd, D. Mance, N. Meshksar, V. Martín, L. Martin-Polo, J. Martino, F. Martin-Porqueras, I. Mateos, P. W. McNamara, J. Mendes, L. Mendes, M. Nofrarias, S. Paczkowski, M. Perreur-Lloyd, A. Petiteau, P. Pivato, E. Plagnol, J. Ramos-Castro, J. Reiche, D. I. Robertson, F. Rivas, G. Russano, J. Slutsky, C. F. Sopuerta, T. Sumner, D. Telloni, D. Texier, J. I. Thorpe, D. Vetrugno, M. Villani, S. Vitale, G. Wanner, H. Ward, P. Wass, W. J. Weber, L. Wissel, A. Wittchen, P. Zweifel
  • ESAC campus
  • Leibniz Universität Hannover
  • Imperial College London
  • University of Urbino Carlo Bo
  • Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
  • Laboratoire de Probabilités et Modèles Aléatoires
  • Università di Trento
  • Fondazione Bruno Kessler
  • University of Birmingham
  • ETH Zurich
  • Università Dell'Aquila
  • Royal Observatory
  • Campus UAB
  • ESTEC - European Space Research and Technology Centre
  • European Space Agency / ESOC
  • Physik-Institut der Universität Zürich
  • University of Glasgow
  • Nuclear Physics Institute ASCR
  • Istituto di Astrofisica e Planetologia Spaziali (IAPS)
  • Universidad Politecnica de Catalunia
  • Institut d’Estudis Espacials de Catalunya (IEEC)
  • NASA Goddard Space Flight Center

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

25 Citations (Scopus)

Résumé

Non-recurrent short-term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n -1 were observed between 2016 February 18 and 2017 July 3 on board the European Space Agency LISA Pathfinder (LPF) mission orbiting around the Lagrange point L1 at 1.5 ×10 6 km from Earth. The energy dependence of three Forbush decreases is studied and reported here. A comparison of these observations with others carried out in space down to the energy of a few tens of MeV n -1 shows that the same GCR flux parameterization applies to events of different intensity during the main phase. FD observations in L1 with LPF and geomagnetic storm occurrence are also presented. Finally, the characteristics of GCR flux non-recurrent variations (peaks and depressions) of duration <2 days and their association with interplanetary structures are investigated. It is found that, most likely, plasma compression regions between subsequent corotating high-speed streams cause peaks, while heliospheric current sheet crossing causes the majority of the depressions.

langue originaleAnglais
Numéro d'article167
journalAstrophysical Journal
Volume874
Numéro de publication2
Les DOIs
étatPublié - 1 avr. 2019
Modification externeOui

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